JSON Formatter & Validator
All-in-one JSON toolkit: prettify, minify, validate, JSONPath query, and structural diff between two JSON objects (highlights add/remove/change). Browser-based.
Frequently Asked Questions
How large a JSON file is supported?
No hard size limit — all parsing happens locally. Files over 50MB may slow the browser; for very large JSON, preprocess with CLI tools like jq before opening here.
Does it detect JSON syntax errors?
Yes. On format, the parser validates syntax and highlights the line and reason for missing commas, mismatched brackets, unescaped quotes, etc., so you can fix them fast.
Is my JSON data uploaded anywhere?
No. Parsing, formatting, and minifying all run in your browser. Your JSON never leaves the device — safe for sensitive configs and user data.
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